Lamy ST Twin Pen Set - 645

The Lamy ST Twin Pen offers a versatile writing experience by combining a ballpoint pen and a 0.5m...

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eBayLAMY 645 MS st Twin Pen and Leather Pouch Set
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Product Information

Full details

The Lamy ST Twin Pen Set is designed for professionals and students who demand versatility and elegance in a single writing tool. By combining a high-quality ballpoint pen and a 0.5mm mechanical pencil in a slim, brushed stainless-steel frame, this set provides a seamless transition between writing and sketching, though users should note that the integrated eraser is small and best suited for light corrections rather than heavy drafting work.

All features

Model Part Number645
BrandLamy

Extended Product Information

FAQs

Can I use any 0.5mm lead in the Lamy ST Twin?

While the pen is optimized for Lamy M 41 lead, any high-quality 0.5mm lead will generally function.

How do I replace the eraser?

Pull off the top push-button cap to access the eraser mount; pull out the old eraser and insert the new replacement.

What is the weight of the Lamy ST Twin?

The pen features a lightweight design, making it comfortable for long-term use without causing hand strain.

Is the leather pouch included in the box?

Yes, the set includes a genuine black leather pouch specifically designed for this model.

Does the pen come with a warranty?

Lamy offers a limited warranty against manufacturing defects; please retain your proof of purchase.

Can I switch the ballpoint refill color?

The M 21 refill is available in various standard colors compatible with the Lamy system.

Troubleshooting

Lead is not advancing

Ensure the internal lead reservoir is not empty and check for a potential lead jam by clearing the tip with a thin needle.

Ballpoint ink flow is skipping

Check if the M 21 refill is properly seated in the housing or replace the refill if it has dried out.

Pros and Cons

Pros

  • Elegant and slim ergonomic design
  • High-quality stainless-steel construction
  • Seamless switching between pen and pencil
  • Professional leather storage pouch included
  • Replaceable components for longevity

Cons

  • Eraser is small and wears down quickly
  • Requires specific Lamy-brand refills
  • Slim profile may feel too light for some users

Setup, Compatibility & Care

To begin using the pen, rotate the upper barrel until you reach the desired writing point. For the mechanical pencil, depress the button at the top to advance the 0.5mm lead.

Compatibility:

  • Ballpoint Refill: Use the Lamy M 21 refill.
  • Pencil Lead: Use 0.5mm lead (Lamy M 41).

Care Instructions:

  • Wipe the stainless steel body with a soft, lint-free cloth to maintain the polished finish.
  • Avoid using non-Lamy compatible refills, as they may damage the internal twist mechanism.
  • Store the pen in the provided leather pouch when not in use to prevent scratches on the barrel.

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